C2 Exothermic and Endothermic

Question 1

What is an exothermic reaction?

Answer 1

Reaction that gives out heat energy

( products have less stored energy than reactants )

Question 2

What happens to the temperature in an exothermic reaction?

Answer 2

Temperature increases

(feels warm)

Question 3

Give an example of an exothermic reaction?

Answer 3

Combustion ( burning)

Acids with alkalis

Magnesium with acid

Respiration

Question 4

What is an endothermic reaction?

Answer 4

Reactions that takes in heat energy (from the surroundings)

( products have more stored energy than reactants )

Question 5

What happens to the temperature in an endothermic reaction?

Answer 5

Temperature decreases (feels cold)

Question 6

Give an example of an endothermic reaction?

Answer 6

Potassium chloride with water

Citric acid and sodium hydrogen carbonate ( sherbet )

photo synthesis

cooking

electrolysis

polymerization

Question 7

What is a reversible reaction?

Answer 7

Reaction can go in both directions

Both the forward and reverse reactions can take place

Question 8

What is the reversible reaction symbol?

Answer 8